var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var goodRouter = require('./routes/goods')

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'views')));

// 设置路由拦截 ， 设置白名单。
app.use(function(req,res,next){
  if(req.cookies.userId){
    next()
  }else{
    // 将商品列表  登陆 登出 加入白名单
    if( req.originalUrl == '/users/login' || req.originalUrl == 'users/loginout' || req.path.indexOf('/goods/list') > -1){
      next()
    }else{
      // 其他页面进行拦截
      res.json({
        status: '10001',
        msg:'用户未登录',
        result : ''
      })
    }
  }
})

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/goods', goodRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
